1. Living Things & Cells

2. Living things… Display organization (cells, tissues, etc.)
Develop and grow
Have the ability to respond to the environment
Can reproduce
Take in and use materials and energy

3. Quick Activity-2 minutes: Partner up with a neighbor and make a list of 5 living things and 5 non-living things

4. Types of Organisms Unicellular Have only one cell Kingdoms:
Eubacteria
Archaebacteria
Protista
A few Fungi
Multicellular
Have many cells
Kingdoms:
Plants
Animals
Most Fungi

5. The Cell Theory Every living thing is made of one or more cells
Cells carry out life functions
All cells come from preexisting cells

6. Important Cell Discoveries
Robert Hooke discovered cells in 1665 looking at dead cork through a microscope
Anton von Leeuwenhoek observed living microscopic organisms in pond water in the 1670s.
Louis Pasteur, 1800s, disproved “spontaneous generation”, made the connection between bacteria and disease, and invented pasteurization

7. 2 Types of Cells and the 6 Kingdoms
Prokaryotic:
Eubacteria: unicellular, live almost everywhere on Earth, can cause disease
Archaebacteria: unicellular, live in extreme conditions
Eukaryotic:
Protista: mostly aquatic, mostly single cellular (some algae are considered colonial), very diverse “catch-all” kingdom
Fungi: decomposers, almost exclusively multicellular, decomposers
Plants: exclusively multicellular, cells have chloroplasts for photosynthesis and have a cell wall
Animals: exclusively multicellular, do not have chloroplasts or cell walls

8. Levels of Organization
Cell: made up of molecules and organelles
*Note: Unicellular organisms stop at this level
Tissue: groups of similar cells grouped together to preform a certain function
Organ: different tissues working together to preform a larger function
Organ System: Two or more organs working together. Ex: nervous system, circulatory system, root system
Organism: All of the previous levels combine to form complex, multicellular organisms. Ex: mouse, pine tree, portabella mushroom, human

9. Specialization
Cells can take on a multitude of shapes, sizes, and functions.
This cell specialization allows for a diversity of organisms, from the smallest bacteria to the biggest redwood, to live here on Earth